Had this come through –
https://www.crowdsupply.com/silicognition/wesp32 – POE ESP supposedly first delivery mid-Dec
https://github.com/espressif/arduino-esp32 No idea how well an Arduino XBP900 interface would work with this.
I personally have found PoE 802.15af has worked very well for “borrowing” some space on some other entities building.
It has meant a long drill for going through an insulated wall, and physical access to the network somewhere in the building. Building maintenance is used to being helpful. It has been easier than IT WiFi access that is nervous about network breaches, and changing passwords.